Self-adaptive, high-precision and large-voltage measuring device
Through the combination of multi-proportional precision voltage divider circuit, relay switch array and embedded controller, the existing voltage measurement devices are solved inadequate accuracy and high cost in complex and variable voltage environments, and high precision and flexible voltage measurement are achieved.
Patent Information
- Application Number
- CN202422039711.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-08-22
AI Technical Summary
Existing voltage measurement devices are difficult to adapt to complex and variable voltage environments, have limited measurement range, insufficient accuracy and high cost.
It adopts multi-proportional precision voltage divider circuits, relay switch arrays and high-precision voltage measurement equipment, combined with embedded controllers, to achieve automatic adjustment of voltage divider ratios and precise selection of voltage divider signals.
It improves the accuracy and flexibility of voltage measurement, and can achieve high-precision measurement in complex and variable voltage environments.
Smart Images
Figure CN223244694U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of voltage measurement devices, and in particular to an adaptive, high-precision, large-voltage measurement device. Background Art
[0002] In today's industrial and scientific research fields, the demand for voltage measurement is increasingly diverse and precise. This is especially true when processing high-voltage signals, which often face challenges such as insufficient accuracy and poor adaptability. High-voltage measurement requires not only equipment that can withstand extreme voltage environments but also high accuracy, a wide measurement range, and the ability to automatically adapt to varying measurement requirements. With the rapid development of industries such as power, electronics, and aerospace, voltage measurement in high-voltage environments has become particularly important. For example, in power systems, voltage monitoring of transmission lines is essential for ensuring stable grid operation. In scientific research, high-voltage experiments are a key tool for exploring material properties and improving device performance. However, the voltages encountered in these applications often far exceed the range of conventional measurement equipment and place extremely high demands on measurement accuracy. Traditional high-voltage measurement methods often use fixed-ratio voltage dividers in conjunction with analog meters or data acquisition cards. This not only limits accuracy but also lacks adaptive adjustment capabilities for varying voltage ranges, making it difficult to meet complex and changing measurement requirements. Alternatively, switching between multiple serial input channels requires the addition of a switching control signal (SEL). This requires manual control or the development of automated control logic, making switching more complex and costly.
[0003] Therefore, existing voltage measurement devices have technical problems such as difficulty in adapting to complex and variable voltage environments, limited measurement range, insufficient accuracy and high cost. Utility Model Content
[0004] The present application provides an adaptive, high-precision, large-voltage measurement device, which solves the technical problems of existing voltage measurement devices, such as difficulty in adapting to complex and variable voltage environments, limited measurement range, insufficient accuracy and high cost. It automatically adjusts the voltage division ratio according to the size of the input voltage, realizes accurate selection of different voltage division signals, and achieves the technical effect of improving the accuracy and flexibility of voltage measurement.
[0005] In order to solve the above problems, the present application provides an adaptive, high-precision, large voltage measurement device, including: a multi-proportional precision voltage divider circuit, which is used to receive a large voltage input signal and divide it into multiple voltage signals of different proportions; a relay switch array, which is connected to multiple voltage divider output ends of the multi-proportional precision voltage divider circuit, and is used to selectively output corresponding divided voltage signals; a high-precision voltage measurement device, which is connected to the output end of the relay switch array, and is used to measure the selected divided voltage signal and convert it into a digital signal output; an embedded controller, which is connected to the high-precision voltage measurement device, and is used to receive and analyze the digital signal, and output a control signal to the relay switch array according to the analysis result, so as to select the most suitable divided voltage signal for precision measurement.
[0006] Preferably, the multi-proportional precision voltage divider circuit includes multiple sub-resistance networks connected in series, and the multiple sub-resistance networks correspond to multiple voltage divider output terminals, wherein the output-input voltage divider ratios of the multiple sub-resistance networks are: 1 / 300, 1 / 150, 1 / 100, 31 / 600 and 1 / 10.
[0007] Preferably, the sub-resistance network includes a plurality of resistors connected in parallel, and the resistance values of the plurality of resistors included in the sub-resistance network are consistent, so as to improve the power capacity and resistance precision of the resistors.
[0008] Preferably, the relay switch array includes a plurality of switches, and the plurality of switches are respectively connected to the plurality of voltage divider output terminals, wherein the selection states of the plurality of switches are controlled by the embedded controller according to the preliminary measurement results of the measuring device.
[0009] Preferably, the high-precision voltage measuring device has a measuring range of 5V and an accuracy of 0.1%.
[0010] Preferably, the multi-proportional precision voltage divider circuit includes five voltage divider output terminals, which are respectively connected to the input terminals of the six switches of the relay switch array.
[0011] The above one or more technical solutions in this application have at least one or more of the following technical effects:
[0012] The present application provides an adaptive, high-precision, large voltage measurement device, comprising: a multi-proportional precision voltage divider circuit, the multi-proportional precision voltage divider circuit being used to receive a large voltage input signal and divide it into multiple voltage signals of different proportions; a relay switch array, the relay switch array being connected to multiple voltage divider output terminals of the multi-proportional precision voltage divider circuit, being used to selectively output corresponding divided voltage signals; a high-precision voltage measurement device, the high-precision voltage measurement device being connected to the output terminal of the relay switch array, being used to measure the selected divided voltage signal and convert it into a digital signal output; an embedded controller being connected to the high-precision voltage measurement device, being used to receive and analyze the digital signal, and outputting a control signal to the relay switch array based on the analysis result, so as to select the most suitable divided voltage signal for precision measurement. The device solves the technical problems of existing voltage measurement devices, such as difficulty in adapting to complex and variable voltage environments, limited measurement range, insufficient accuracy, and high cost, and realizes automatic adjustment of the voltage divider ratio according to the size of the input voltage, and realizes accurate selection of different divided voltage signals, thereby achieving the technical effect of improving the accuracy and flexibility of voltage measurement. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0014] Figure 1 This is a block diagram of an adaptive, high-precision, high-voltage measurement device provided in an embodiment of the present application;
[0015] Figure 2 A schematic diagram of a multi-proportional precision voltage divider circuit of an adaptive, high-precision, large voltage measurement device provided in an embodiment of the present application;
[0016] Figure 3 This is a schematic diagram showing the connection between the voltage divider output terminal and the relay switch array of an adaptive, high-precision, large voltage measurement device provided in an embodiment of the present application.
[0017] Figure numerals: resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, resistor R7, resistor R8, resistor R9, resistor R10, resistor R11, resistor R45, resistor R46, resistor R47, resistor R48, resistor R49, resistor R50, resistor R51, switch K1, switch K2, switch K3, switch K4, switch K5, switch K6. DETAILED DESCRIPTION
[0018] To make the above-mentioned purposes, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.
[0019] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.
[0020] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the description of the embodiments of this application are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of this application. The term "and / or" used in this application includes any and all combinations of one or more of the relevant listed items.
[0021] The present application provides an adaptive, high-precision, large-voltage measuring device, which solves the technical problems of existing voltage measuring devices such as difficulty in adapting to complex and variable voltage environments, limited measurement range, insufficient accuracy and high cost.
[0022] The technical solution in this application has the following overall structure: the measuring device consists of four parts, namely a multi-proportional precision voltage divider circuit, a relay switch array, a high-precision voltage measuring device and an embedded controller, wherein the multi-proportional precision voltage divider circuit performs precise voltage division on the input large voltage signal and can output voltage division outputs of different proportions as needed; the relay switch array selects the voltage division output; the high-precision voltage measuring device measures the voltage division voltage of the selected output and converts it into a digital signal output; the embedded controller performs data analysis based on the output of the measuring device, and outputs high and low levels based on the data analysis results. After being driven by the operational amplifier, it controls the relay switch array to select the most appropriate voltage division output, thereby automatically adjusting the voltage division ratio according to the size of the input voltage and realizing accurate selection of different voltage division signals, thereby achieving the technical effect of improving the accuracy and flexibility of voltage measurement.
[0023] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0024] Example
[0025] This application provides an adaptive, high-precision, large voltage measurement device, such as Figure 1 As shown, the device consists of four parts: a multi-proportional precision voltage divider circuit, a relay switch array, a high-precision voltage measurement device and an embedded controller. The device includes: a multi-proportional precision voltage divider circuit, which is used to receive a large voltage input signal and divide it into multiple voltage signals of different proportions.
[0026] Optionally, a multi-ratio precision voltage divider circuit is used to receive a large voltage input signal and divide it down to output multiple voltage signals of varying proportions. It utilizes a precise combination of resistors (or other electronic components) to achieve proportional voltage distribution. The output voltage signals of varying proportions are used to drive different circuit modules and perform precise voltage measurements. Specifically, the multi-ratio precision voltage divider circuit is primarily based on Ohm's law and the principle of circuit voltage division. The circuit typically contains multiple resistors (or resistor networks) connected in series, parallel, or a combination of series and parallel to form multiple voltage divider nodes. A high input voltage generates a voltage drop across these resistors, resulting in multiple output voltages of varying proportions.
[0027] Further, such as Figure 2 As shown, the multi-proportional precision voltage divider circuit includes multiple sub-resistance networks connected in series, and the multiple sub-resistance networks correspond to multiple voltage divider output terminals, wherein the output-input voltage divider ratios of the multiple sub-resistance networks are: 1 / 300, 1 / 150, 1 / 100, 31 / 600 and 1 / 10.
[0028] Furthermore, the sub-resistance network includes multiple resistors connected in parallel, and the resistance values of the multiple resistors included in the sub-resistance network are consistent, so as to improve the resistance power capacity and resistance accuracy.
[0029] Optional, IN1+ and IN1- are the positive and negative poles of the large voltage input terminal, OUT0~OUT4 are combined into the positive and negative poles of the output terminal, R3=2*R4, R2=R5=18*(R3+R4), R1=R49=10*R2; the other resistors are R45=R6=R9=R48=R49=R50=R51=R1, R46=R7=R10=R47=R5=R8=R11=R 2. For example, based on the relationship between resistance values and considering the power capacity of the resistors, resistors with the following specifications may be preferred (but not limited to): R4 = 1kΩ (0.125W), R46 = R7 = R10 = R47 = R5 = R8 = R11 = R2 = 54kΩ (0.125W), R3 = 2kΩ (0.125W), R45 = R6 = R9 = R48 = R49 = R50 = R51 = R1 = 540kΩ (1W).
[0030] Optionally, there are two purposes for using four resistors in parallel in the circuit: one is to increase the power capacity of the resistors to prevent the resistors from overheating, which will cause the voltage divider ratio to change; the other is that the four resistors in parallel can increase the resistor accuracy by 1 times. If a 0.1% precision resistor is used, the actual accuracy can reach 0.05%. Figure 2 The main output-input voltage divider ratios are: 1 / 300 (OUT0-OUT2), 1 / 150 (OUT3-OUT0), 1 / 100 (OUT3-OUT2), 31 / 600 (OUT4-OUT0), 1 / 10 (OUT4-OUT1), which can effectively measure voltages up to 1500V.
[0031] A relay switch array is connected to a plurality of voltage-dividing output terminals of the multi-proportional precision voltage-dividing circuit, and is used for selectively outputting corresponding voltage-dividing voltage signals.
[0032] Optionally, the relay switch array is composed of multiple relays, each relay can control the opening and closing state of its corresponding circuit, and the relay switch array is connected to multiple voltage divider output terminals of the multi-proportional precision voltage divider circuit, which means that each relay is associated with one or more voltage divider output terminals of the voltage divider circuit. According to the preset control logic or external control signal, the relay connected to the specific voltage divider output terminal is selectively closed to realize the selective output of the voltage divider voltage signal, that is, from the multiple voltage divider voltage signals, the voltage signal that best suits the current measurement task or circuit requirement is selected and output to the subsequent measurement equipment.
[0033] Further, such as Figure 3 As shown, the relay switch array includes a plurality of switches, and the plurality of switches are respectively connected to the plurality of voltage divider output terminals, wherein the selection states of the plurality of switches are controlled by the embedded controller according to the preliminary measurement results of the measuring device.
[0034] Furthermore, the multi-proportional precision voltage divider circuit includes five voltage divider output terminals, which are respectively connected to the input terminals of the six switches of the relay switch array.
[0035] Optionally, OUT0 to OUT4 are the five output terminals of the multi-proportional precision voltage divider circuit, which are respectively connected to the input terminals of the six switches of the switch array, among which the OUT0 output terminal is divided into two paths, respectively connected to the input terminals of switches K3 and K4, V+ and V- are the output terminals of the switch array, connected to the two input terminals (positive and negative poles) of the subsequent high-precision voltage measurement equipment; inside the switch array, V+ is connected to the output terminal of switches K4 to K6, and V- is connected to the output terminal of switches K1 to K3.
[0036] Under the control of the embedded controller, the relay switch array realizes the selection of the output voltage value by closing and opening the switches. In actual operation, in order to ensure the accuracy of the voltage divider ratio, only one of switches K4, K5, and K6 can be closed at the same time, and only one of switches K3, K2, and K1 can be closed at the same time, and K4 and K3 cannot be closed at the same time. Combined with the multi-proportional precision voltage divider circuit, the specific working scenarios are as follows: (1) When K4 and K2 are closed and the other switches are open, the voltage divider ratio is 1 / 300; (2) When K5 and K3 are closed and the other switches are open, the voltage divider ratio is 1 / 150; (3) When K5 and K2 are closed and the other switches are open, the voltage divider ratio is 1 / 100; (2) When K6 and K3 are closed and the other switches are open, the voltage divider ratio is 31 / 600; (2) When K4 and K1 are closed and the other switches are open, the voltage divider ratio is 1 / 10.
[0037] A high-precision voltage measuring device is connected to the output end of the relay switch array and is used to measure the selected divided voltage signal and convert it into a digital signal for output.
[0038] Optionally, a high-precision voltage measuring device is an instrument for accurately measuring voltage, which has the characteristics of high sensitivity, high resolution and high precision. It can accurately capture tiny voltage changes and convert these changes into quantifiable digital signal outputs. Specifically, the high-precision voltage measuring device first receives the divided voltage signal selected from the output end of the relay switch array, and the received divided voltage signal enters the internal circuit of the high-precision voltage measuring device for processing. These circuits usually include input buffers, amplifiers, filters, etc., which are used to amplify, filter and stabilize the signal. The processed voltage signal is sent to the analog-to-digital converter (ADC) for analog-to-digital conversion. The analog-to-digital converter converts the analog voltage signal into a digital signal. Finally, the converted digital signal is output by the high-precision voltage measuring device.
[0039] Furthermore, the high-precision voltage measuring device has a measuring range of 5V and an accuracy of 0.1%.
[0040] An embedded controller is connected to the high-precision voltage measurement device, and is used to receive and analyze the digital signal, and output a control signal to the relay switch array according to the analysis result, so as to select the most suitable divided voltage signal for precision measurement.
[0041] An embedded controller is an intelligent controller that integrates key components such as a microprocessor (such as an MCU, DSP, etc.), memory, and input / output interfaces. It can execute complex algorithms and logical judgments, allowing voltage measurement equipment to operate under optimal measurement conditions, thereby improving measurement accuracy and reliability.
[0042] The embedded controller selects the voltage divider output terminal with the largest input-output voltage divider ratio, controls the relay switch array to perform conduction measurement, and obtains an initial measurement result. The initial measurement result is compared with the range of the high-precision voltage measurement device, and the adaptability of the voltage divider ratio is analyzed and determined. The voltage divider output terminal is updated and selected accordingly, and the output control level is correspondingly controlled. The operational amplifier controls the opening and closing of multiple switches of the relay switch array according to the control level, and connects the appropriate voltage divider ratio channel to perform high-precision measurement.
[0043] Optionally, the embedded controller controls the relay switch array to select the channel with the largest voltage divider ratio of 1 / 300 for initial measurement; and makes an estimate based on the data obtained from the initial measurement, and compares the estimated data with the measurement range of each voltage divider ratio channel; selects the channel closest to but not exceeding the maximum value of the measuring device range, and performs re-measurement to obtain a measurement result output with higher accuracy.
[0044] The device provided in the embodiments of the present application has at least the following technical effects or advantages:
[0045] The present invention provides an adaptive, high-precision, large voltage measurement device, comprising: a multi-proportional precision voltage divider circuit for receiving a large voltage input signal and dividing it into multiple voltage signals of different proportions; a relay switch array connected to multiple voltage divider output terminals of the multi-proportional precision voltage divider circuit for selectively outputting corresponding divided voltage signals; a high-precision voltage measurement device connected to the output terminals of the relay switch array for measuring the selected divided voltage signal and converting it into a digital signal for output; and an embedded controller connected to the high-precision voltage measurement device for receiving and analyzing the digital signal and outputting a control signal to the relay switch array based on the analysis result to select the most suitable divided voltage signal for precision measurement. The device solves the technical problems of existing voltage measurement devices, such as difficulty in adapting to complex and variable voltage environments, limited measurement range, insufficient accuracy, and high cost, by automatically adjusting the voltage divider ratio according to the size of the input voltage and accurately selecting different divided voltage signals, thereby achieving the technical effect of improving the accuracy and flexibility of voltage measurement.
[0046] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.
[0047] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if such changes and modifications of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such changes and modifications.
Claims
1. An adaptive, high-precision, high-voltage measuring device, characterized in that: The device comprises: A multi-ratio precision voltage divider circuit, which is used to receive a large voltage input signal and divide it into multiple voltage signals of different ratios; a relay switch array connected to a plurality of voltage-dividing output terminals of the multi-proportional precision voltage-dividing circuit, and configured to selectively output corresponding voltage-dividing voltage signals; A high-precision voltage measuring device, connected to the output end of the relay switch array, for measuring the selected divided voltage signal and converting it into a digital signal for output; An embedded controller is connected to the high-precision voltage measurement device, and is used to receive and analyze the digital signal, and output a control signal to the relay switch array according to the analysis result, so as to select the most suitable divided voltage signal for precision measurement.
2. The adaptive, high-precision, high-voltage measuring device according to claim 1, characterized in that: The multi-proportional precision voltage divider circuit includes multiple sub-resistance networks connected in series, and the multiple sub-resistance networks correspond to multiple voltage divider output terminals, wherein the output-input voltage divider ratios of the multiple sub-resistance networks are: 1 / 300, 1 / 150, 1 / 100, 31 / 600 and 1 / 10.
3. The adaptive, high-precision, high-voltage measuring device according to claim 2, characterized in that: The sub-resistance network includes multiple resistors connected in parallel, and the resistance values of the multiple resistors included in the sub-resistance network are consistent, so as to improve the resistance power capacity and resistance accuracy.
4. The adaptive, high-precision, high-voltage measuring device according to claim 3, characterized in that: The relay switch array includes a plurality of switches, each of which is connected to a plurality of the voltage-dividing output terminals. The selection states of the plurality of switches are controlled by the embedded controller according to a preliminary measurement result of the measuring device.
5. The adaptive, high-precision, high-voltage measuring device according to claim 1, characterized in that: The high-precision voltage measuring device has a measuring range of 5V and an accuracy of 0.1%.
6. The adaptive, high-precision, high-voltage measuring device according to claim 4, characterized in that: The multi-proportional precision voltage divider circuit includes five voltage divider output terminals, which are respectively connected to the input terminals of the six switches of the relay switch array.